Hi,
We have stayed in Kissimmee on most of our visits. However, that is purely down to the fact that is where a lot of the villa communities are.
Location is pretty good for all the attractions, supermarkets & restaurants.
I wouldn't say it was necessarily a place I would go if we were not staying there.
I can recommend an evening at Old Town which is totally unique and nothing like anything else in Orlando, also Celebration is just off the 192 highway and that is definitely worth a visit - it's a lovely place to go.